Too bad we didn’t set up an office pool in January. Someone could have cleaned up choosing the closest date for the inevitable divorce between President Trump and Elon Musk. This pair of modest egos were never a good match for the long haul, and on Thursday their breakup turned into “The War of the Roses.” It certainly makes for entertaining political theater, at least for Democrats. First came Mr. Musk’s broadside against the One Big Beautiful Bill Act as an “abomination.” Mr. Trump...